<template>
  <view class="content">
    <!-- 顶部导航栏 -->
    <navbar></navbar>
    <scroll-view scroll-y class="main" @scrolltolower="scrolltolower" refresher-enabled @refresherrefresh="refresh" :refresher-triggered="refresherTriggered">
      <!-- 轮播图 -->
      <Carousel :banners="banners" :height="280 + 'rpx'"></Carousel>
      <!-- 分类 -->
      <CateScroll :categoryHeadMutli="category"></CateScroll>
      <!-- 人气推荐 -->
      <view class="panel recommend">
        <view class="item" v-for="item in hotMutli" :key="item.id">
          <view class="title">
            {{ item.title }}<text>{{ item.alt }}</text>
          </view>
          <navigator hover-class="none" :url="`/pages/recommend/index?type=${item.type}`" class="cards">
            <image mode="aspectFit" v-for="img in item.pictures" :key="img" :src="img"></image>
          </navigator>
        </view>
      </view>
      <!-- 新鲜好物 -->
      <view class="panel fresh">
        <view class="title">
          新鲜好物
          <navigator hover-class="none" class="more" url="/pages/recommend/index?type=5">更多</navigator>
        </view>
        <view class="cards">
          <navigator hover-class="none" :url="`/pages/goods/index?id=${item.id}`" v-for="item in homeNew" :key="item.id">
            <image mode="aspectFit" :src="item.picture"></image>
            <view class="name">{{ item.name }}</view>
            <view class="price"> <text class="small">¥</text>{{ item.price }} </view>
          </navigator>
        </view>
      </view>
      <!-- 热门品牌 -->
      <view class="panel brands">
        <view class="title">
          热门品牌
          <navigator hover-class="none" class="more" url="/pages/list/index">更多</navigator>
        </view>
        <view class="cards">
          <navigator hover-class="none" url="/pages/goods/index">
            <image mode="aspectFit" src="http://static.botue.com/erabbit/static/uploads/brand_logo_1.jpg"></image>
            <view class="name">小米</view>
            <view class="price">99元起</view>
          </navigator>
          <navigator hover-class="none" url="/pages/goods/index">
            <image mode="aspectFit" src="http://static.botue.com/erabbit/static/uploads/brand_logo_2.jpg"></image>
            <view class="name">TCL</view>
            <view class="price">199起</view>
          </navigator>
          <navigator hover-class="none" url="/pages/goods/index">
            <image mode="aspectFit" src="http://static.botue.com/erabbit/static/uploads/brand_logo_3.jpg"></image>
            <view class="name">饭小宝</view>
            <view class="price">9.9起</view>
          </navigator>
          <navigator hover-class="none" url="/pages/goods/index">
            <image mode="aspectFit" src="http://static.botue.com/erabbit/static/uploads/brand_logo_4.jpg"></image>
            <view class="name">鳄鱼</view>
            <view class="price">299起</view>
          </navigator>
        </view>
      </view>
      <!-- 猜你喜欢 -->
      <Guess :homeGoodsGuessLike="guessLike" :homeGoodsGuessLikeTotal="guessLikeTotal"></Guess>
    </scroll-view>
  </view>
</template>

<script>
import navbar from './components/Navbar.vue'
import { getHomeBanner, getHomeCategoryMutli, getHomeHotMutli, getHomeNew, getHomeGoodsGuessLike } from '@/api/home'
export default {
  components: {
    navbar
  },
  data() {
    return {
      /** 轮播图 */
      banners: [],
      /** 前台分类 */
      category: [],
      /** 人气推荐 */
      hotMutli: [],
      /** 新鲜好物 */
      homeNew: [],
      /** 猜你喜欢 */
      guessLike: [],
      guessLikeTotal: 0,
      /** 当前下拉刷新状态 */
      refresherTriggered: false
    }
  },
  computed: {},
  async onLoad() {
    /** 是否正在加载下一页数据 */
    this.isLoading = false
    /** 总页数 */
    this.guessPages = 0
    /** 总条数 */
    this.guessLikeTotal = 0
    /** 猜你喜欢分页参数 */
    this.guessParams = {
      page: 1,
      pageSize: 10
    }
    this.getBanner()
    this.getCate()
    this.getHomeHotMutli()
    this.getHomeNew()
    this.getHomeGoodsGuessLike()
  },
  methods: {
    /** 轮播图 */
    async getBanner() {
      let res = await getHomeBanner()
      this.banners = res.result
    },

    /** 前台分类 */
    async getCate() {
      let res = await getHomeCategoryMutli()
      this.category = res.result
    },

    /** 人气推荐 */
    async getHomeHotMutli() {
      let res = await getHomeHotMutli()
      this.hotMutli = res.result
    },
    /** 新鲜好物 */
    async getHomeNew() {
      let res = await getHomeNew()
      this.homeNew = res.result
    },
    /** 猜你喜欢 */
    async getHomeGoodsGuessLike() {
      let res = await getHomeGoodsGuessLike(this.guessParams)
      // console.log(res.result.pages)
      /** 总页数 */
      this.guessPages = res.result.pages
      this.guessLikeTotal = res.result.counts
      this.guessLike = [...this.guessLike, ...res.result.items]
    },
    /** 滚动到底部 */
    async scrolltolower() {
      if (this.isLoading) {
        return
      } else if (this.guessParams.page < this.guessPages) {
        /** 数据不是最后一页 */
        /** 正在加载下一页数据 */
        this.isLoading = true
        this.guessParams.page++
        await this.getHomeGoodsGuessLike()
        this.isLoading = false
      }
    },
    /** 下拉刷新 */
    async refresh() {
      this.refresherTriggered = true

      /** 清空页面数据 */
      /** 轮播图 */
      this.banners = []
      /** 前台分类 */
      this.category = []
      /** 人气推荐 */
      this.hotMutli = []
      /** 新鲜好物 */
      this.homeNew = []
      /** 猜你喜欢 */
      this.guessLike = []
      this.guessLikeTotal = 0

      /** 重置全局变量 */
      /** 总页数 */
      this.guessPages = 0
      /** 总条数 */
      this.guessLikeTotal = 0
      /** 猜你喜欢分页参数 */
      this.guessParams = {
        page: 1,
        pageSize: 10
      }

      // 重新发起请求
      await Promise.all([this.getBanner(), this.getCate(), this.getHomeHotMutli(), this.getHomeNew(), this.getHomeGoodsGuessLike()])

      this.refresherTriggered = false
    }
  }
}
</script>

<style lang="scss" scoped>
.content {
  height: 100vh;
  display: flex;
  flex-direction: column;
}
.main {
  flex: 1;
  overflow: hidden;
  background-color: #f7f7f8;
}
/* 公共面板 */
.panel {
  margin: 20rpx 20rpx 0;
  border-radius: 10rpx;
  background-color: #fff;
  .title {
    display: flex;
    align-items: center;
    padding: 24rpx 24rpx 0;
    font-size: 32rpx;
    color: #262626;
    position: relative;
    text {
      font-size: 24rpx;
      color: #7f7f7f;
      margin-left: 18rpx;
    }
  }
  .more {
    position: absolute;
    right: 24rpx;
    font-size: 26rpx;
    color: #7f7f7f;
  }
  .cards {
    display: flex;
  }
  .name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}
/* 推荐专区 */
.recommend {
  display: flex;
  flex-wrap: wrap;
  .item {
    display: flex;
    flex-direction: column;
    width: 50%;
    height: 254rpx;
    border-right: 1rpx solid #eee;
    border-top: 1rpx solid #eee;
    &:nth-child(2n) {
      border-right: 0 none;
    }
    &:nth-child(-n + 2) {
      border-top: 0 none;
    }
  }
  .cards {
    flex: 1;
    padding: 15rpx 20rpx;
    justify-content: space-between;
    image {
      width: 48%;
    }
  }
}

/* 新鲜好物 */
.fresh {
  min-height: 320rpx;
  .price {
    line-height: 1;
    text-align: left;
    font-size: 26rpx;
    color: #cf4444;
  }
  .small {
    font-size: 80%;
  }
}
.fresh .cards navigator,
.brands .cards navigator {
  width: 25%;
  padding: 15rpx 20rpx 20rpx;
  line-height: 1;
  text-align: center;
}
.fresh image,
.brands image {
  width: 126rpx;
  height: 126rpx;
}
.fresh .name,
.brands .name {
  margin: 20rpx 0 16rpx;
  font-size: 24rpx;
  color: #262626;
}
.brands {
  .price {
    font-size: 24rpx;
    color: #999;
  }
}
</style>
